Sorry about the confusion. The images are actually part of the Chapter 3 download that you can find on this page:
If you download the Chapter 3 zip file, you will find a folder called "01_original_images" that has the untouched original image files. You will also find a folder called "02_photoshop_files" that has the PSD files that were created during chapter 3 as well as "03_final_images" that shows the final product.
As a shortcut, you can just download this zip file directly from this link:
Hopefully this helps. Let me know if you have any questions.